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Direct observation of nanoscale dynamics of ferroelectric degradation

Author

Listed:
  • Qianwei Huang

    (The University of Sydney)

  • Zibin Chen

    (The University of Sydney)

  • Matthew J. Cabral

    (The University of Sydney)

  • Feifei Wang

    (Shanghai Normal University)

  • Shujun Zhang

    (University of Wollongong)

  • Fei Li

    (Xi’an Jiaotong University)

  • Yulan Li

    (Pacific Northwest National Laboratory)

  • Simon P. Ringer

    (The University of Sydney)

  • Haosu Luo

    (Chinese Academy of Sciences)

  • Yiu-Wing Mai

    (The University of Sydney)

  • Xiaozhou Liao

    (The University of Sydney)

Abstract

Failure of polarization reversal, i.e., ferroelectric degradation, induced by cyclic electric loadings in ferroelectric materials, has been a long-standing challenge that negatively impacts the application of ferroelectrics in devices where reliability is critical. It is generally believed that space charges or injected charges dominate the ferroelectric degradation. However, the physics behind the phenomenon remains unclear. Here, using in-situ biasing transmission electron microscopy, we discover change of charge distribution in thin ferroelectrics during cyclic electric loadings. Charge accumulation at domain walls is the main reason of the formation of c domains, which are less responsive to the applied electric field. The rapid growth of the frozen c domains leads to the ferroelectric degradation. This finding gives insights into the nature of ferroelectric degradation in nanodevices, and reveals the role of the injected charges in polarization reversal.

Suggested Citation

  • Qianwei Huang & Zibin Chen & Matthew J. Cabral & Feifei Wang & Shujun Zhang & Fei Li & Yulan Li & Simon P. Ringer & Haosu Luo & Yiu-Wing Mai & Xiaozhou Liao, 2021. "Direct observation of nanoscale dynamics of ferroelectric degradation," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-22355-1
    DOI: 10.1038/s41467-021-22355-1
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